Cleaner for carding bar teeth



May 30, 1939. s. c. MA-RKLEY 2,160,703

Gamma FOR CARDING BAR TEETH Filed Jan. 30, 1957 2 Sheets-Sheet 1 y s. c.MARKLEY 2,160,703

CLEANER FOR CARDING BAR TEETH Filed Jan. 50, .1937 2 Sheets-Sheet 2Patented May 30, 1939 UNITED STATES PATENT OFFICE 6 Claims.

- My invention relates to an improvement in cleaners for carding barteeth.

The object is to provide means to be applied to any make of tobaccostemmers for absolutely and positively cleaning the carding teeth of anyand all tobacco at the end of the stripping action. This invention doesaway with the requirement for carding teeth or blades on the cleaningrolls, which sometimes tear up the tobacco strips in cleaning thecarding teeth. This invention also does away with all jerking of themachine which results from carding teeth becoming loaded with stems orleaves.

While the present invention has been designed for use with the machineset forth in patent to Pasley, No. 1,930,406, of October 10, 1933, it isapplicable to all tobacco-stemmers of this general type, and it isintended to be made as a separate unit in order that it may be appliedto any and all of these machines.

In the accompanying drawings:

Fig. 1 is a view in elevation and. partly in section of a standard typeof stripping machine showing the present invention applied thereto;

Fig. 2 is a fragmentary section on line 2-2 of Fig.

Fig. 3 is an enlarged side view of my improvement on line 3-3 of Fig. 1,showing the endless sprocket-chain in section;

Fig. 4 is a top plan View of the same;

Fig. 5 is a bottom plan view;

Fig. 6 is a longitudinal sectional view;

Fig. 7 is a transverse section on the line 1-4 of Fig. 6, looking in thedirection of the arrows;

Fig. 8 is a similar section on the line 88 of Fig. 6, looking in thedirection of the arrows; and

Fig.9 is a view of a slightly modified application of the invention asapplied to a rotary stripper as distinguished from the endless belttype.

The numeral I represents a bar to the sides of which the stripper cardclothing 2 is securely held by the flange 3, the latter being held fastmanner.

A pusher or ejector l 0 in the form of a channel embraces the strippercard clothing 2, as shown in Figs. 3, '7 and 8, and the upper surface ofthis pusher or ejector is provided with transverse slots I! throughoutits length which form clearance spaces for the teeth 12 of the strippercard clothing which normally project a predetermined distanceth-erethrough; as shown in Figs. 3, 6, 7

and 8, in which position they are preferably held by an I-shaped springHi, the ends of which conveniently extend loosely into slots l4 formedtherefor in the sides of the pusher or ejector l0.

As is customary, these carding bars are secured to the endless chains 6at suitable intervals as viewed in Fig. 1, and they are so synchronizedthat the teeth l2 meet or substantially meet during the strippingoperation as shown by two of them in Fig. 1.

On the shafts l5 which drive the sprocketwheels 8 and the endless chain6, disks it are secured (see Figs. 1 and 2) these being of such diameterand so placed on the shaft I5 that they force the pusher or ejector I0outwardly over and. for the length of the teeth l2, as shown at theright-hand end of Fig. 1, thereby completely housing the teeth while thechains are around the cams I6.

During their passage around the disks, the outer surface of the pusherl0 and the tip ends of the teeth I2 are met by cleaning rolls ll, ofwhich there is at least one for each stripping member. These cleaningrolls I! are preferably made of leather running longitudinally of theroll, and their function is to clean off any tobacco that might be lefton this improved carding bar.

In this way, carding or blades on the cleaning rolls are done away withentirely since in tobacco strippers now in use they sometimes tear upthe tobacco strips in cleaning the carding teeth, and my presentimprovement also does away with all jerking so common with the machinesnow in use when carding teeth become loaded with stems or leaves.

In the modified construction, an adaptation is shown for the type ofmachine disclosed in the wellknown Strickland tobacco stemmer asexemplified in U. S. Patent No. 1,301,193, issued April 22, 1919, seeFigs. 25 and 26, in which my improvements are applied to a rotary devicel8, each of which is mounted on a shaft 2 I, to which the carding bars22 are attached, and as the shafts turn in the direction, for instance,of the arrows shown in Fig. 9, the ejectors or push-off device 23traverse the fixed cams 24, and in that way strip the teeth 25. Cleanerbrushes 26 are rotatably mounted in position to brush the ejectors asthey pass them.

With my invention, the particles of tobacco leaf and stems adhering tothe teeth I2 and 25 are removed without any of the attendant objectionshitherto mentioned.

I claim:

1. A push-01f or ejector which includes a bar, and a channel-shapedpusher slidably connected therewith, and enclosing the bar on threesides, thereby housing the same, the bar carrying card clothing and thepusher having openings through which the card clothing is adapted toslidably project.

2. A push-ofi or ejector which includes a bar, a channel-shaped pusherslidably connected therewith, and enclosing the bar on three sides,thereby housing the same, the bar carrying card clothing and the pusherhaving openings through which the card clothing is adapted to slidablyproject, and means for preventing endwise movement between the bar andthe pusher.

3. A push-01f or ejector including a bar carrying card clothing and apusher embracing the bar on at least three sides and having openings onone side through which the card clothing projects, and a springsupported at its ends in the sides of the pusher and pressing yieldablyagainst the bar at an intermediate point.

4. A push-off or ejector including a bar carrying card clothing and apusher embracing the bar on at least three sides and having openings onone side through which the card clothing projects, a spring supported atits ends in the sides of the pusher and pressing yieldably against thebar at an intermediate point, the sides or the pusher being slotted, andmeans extending from the bar into the slots for guiding the relativemovement of the bar and pusher and preventing substantial endwisemovement of one with respect to the other.

5. The combination of a bar, card clothing supported thereby, flangessecured to the opposite edges of the bar and embracing the oppositeedges of the card clothing, whereby to secure the latter throughout itslength to the bar, a pusher embracing the flanges and the bar and havingopenings therein for the teeth of the card clothing and a springinterposed between the bar and the sides of the pusher for exertingpressure upon the bar for holding the latter yieldingly in its normalposition.

6. A push-off or ejector including a bar carrying card clothing and apusher embracing the bar on at least three sides, thereby housing thebar, means for precluding substantial endwise movement between the barand the pusher, the sidesof the pusher having slots therein and anI-shaped spring, the ends of which extend into the slots in the sides ofthe pusher, and the center of which bears upon the bar whereby tomaintain a normal relationship between bar and pusher.

SAMUEL C. MARKLEY.

